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feat: replace fee rate estimator with mempool.space client
Signed-off-by: Philipp Hoenisch <[email protected]>
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Original file line number | Diff line number | Diff line change |
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[package] | ||
name = "mempool" | ||
version = "0.1.0" | ||
edition = "2021" | ||
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html | ||
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[dependencies] | ||
anyhow = "1" | ||
reqwest = { version = "0.11", features = ["json", "blocking"] } | ||
serde = { version = "1", features = ["derive"] } | ||
serde_json = { version = "1" } | ||
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[dev-dependencies] | ||
tokio = { version = "1", features = ["full"] } |
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use anyhow::Result; | ||
use serde::Deserialize; | ||
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const MEMPOOL_FEE_RATE_URL_MAINNET: &str = "https://mempool.space"; | ||
const MEMPOOL_FEE_RATE_URL_SIGNET: &str = "https://mempool.space/signet"; | ||
const MEMPOOL_FEE_RATE_URL_TESTNET: &str = "https://mempool.space/testnet"; | ||
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#[derive(Deserialize, Debug)] | ||
#[serde(rename_all = "camelCase")] | ||
pub struct FeeRate { | ||
pub fastest_fee: usize, | ||
pub half_hour_fee: usize, | ||
pub hour_fee: usize, | ||
pub economy_fee: usize, | ||
pub minimum_fee: usize, | ||
} | ||
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impl FeeRate { | ||
fn local_fee_rate() -> Self { | ||
FeeRate { | ||
// we on purpose have different values to see an effect for clients asking for different | ||
// priorities | ||
fastest_fee: 5, | ||
half_hour_fee: 4, | ||
hour_fee: 3, | ||
economy_fee: 2, | ||
minimum_fee: 1, | ||
} | ||
} | ||
} | ||
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#[derive(PartialEq)] | ||
pub enum Network { | ||
Mainnet, | ||
Signet, | ||
Testnet, | ||
/// We assume a local regtest setup and will not perform any request to mempool.space | ||
Local, | ||
} | ||
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pub struct MempoolFeeRateEstimator { | ||
url: String, | ||
network: Network, | ||
} | ||
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impl MempoolFeeRateEstimator { | ||
pub fn new(network: Network) -> Self { | ||
let url = match network { | ||
Network::Mainnet => MEMPOOL_FEE_RATE_URL_MAINNET, | ||
Network::Signet => MEMPOOL_FEE_RATE_URL_SIGNET, | ||
Network::Testnet => MEMPOOL_FEE_RATE_URL_TESTNET, | ||
Network::Local => "http://thereisnosuchthingasabitcoinmempool.com", | ||
} | ||
.to_string(); | ||
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Self { url, network } | ||
} | ||
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pub async fn fetch_fee(&self) -> Result<FeeRate> { | ||
if Network::Local == self.network { | ||
return Ok(FeeRate::local_fee_rate()); | ||
} | ||
let client = reqwest::Client::new(); | ||
let url = format!("{}/api/v1/fees/recommended", self.url); | ||
let response = client.get(url).send().await?; | ||
let fee_rate = response.json().await?; | ||
Ok(fee_rate) | ||
} | ||
} | ||
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#[cfg(test)] | ||
mod tests { | ||
use super::*; | ||
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// we keep this test running on CI even though it connects to the internet. This allows us to | ||
// be notified if the API ever changes | ||
#[tokio::test] | ||
pub async fn test_fetching_fee_rate_from_mempool() { | ||
let mempool = MempoolFeeRateEstimator::new(Network::Testnet); | ||
let _testnet_fee_rate = mempool.fetch_fee().await.unwrap(); | ||
let mempool = MempoolFeeRateEstimator::new(Network::Mainnet); | ||
let _testnet_fee_rate = mempool.fetch_fee().await.unwrap(); | ||
let mempool = MempoolFeeRateEstimator::new(Network::Signet); | ||
let _testnet_fee_rate = mempool.fetch_fee().await.unwrap(); | ||
let mempool = MempoolFeeRateEstimator::new(Network::Local); | ||
let _testnet_fee_rate = mempool.fetch_fee().await.unwrap(); | ||
} | ||
} |